- Have a diagnosis of sarcoidosis with evidence of parenchymal disease on chest radiograph (Stage II or III) or Stage I disease by chest radiographs and evidence of abnormal PFT as below or normal chest radiograph; or abnormal PFT, with abnormal chest computed tomography (CT) and evidence of sarcoid lung involvement by histology. Subjects with concurrent extrapulmonary sarcoidosis, particularly skin and eye involvement, are encouraged to be enrolled.